# Copyright(c) 2015-2018 ACCESS CO., LTD. All rights reserved.

use Croma

defmodule AntikytheraCore.ExecutorPool.RegisteredName do
  alias Antikythera.ExecutorPool.Id, as: EPoolId

  @prefix "AntikytheraCore.ExecutorPool"

  defun supervisor(epool_id :: v[EPoolId.t]) :: atom do
    Module.safe_concat(supervisor_parts(epool_id))
  end
  defun supervisor_unsafe(epool_id :: v[EPoolId.t]) :: atom do
    Module.concat(supervisor_parts(epool_id))
  end
  defunp supervisor_parts(epool_id :: v[EPoolId.t]) :: [String.t] do
    common_parts(epool_id, "Sup")
  end

  defun action_runner_pool_multi(epool_id :: v[EPoolId.t]) :: atom do
    Module.safe_concat(action_runner_pool_multi_parts(epool_id))
  end
  defun action_runner_pool_multi_unsafe(epool_id :: v[EPoolId.t]) :: atom do
    Module.concat(action_runner_pool_multi_parts(epool_id))
  end
  defunp action_runner_pool_multi_parts(epool_id :: v[EPoolId.t]) :: [String.t] do
    common_parts(epool_id, "ActionRunnerPoolMulti")
  end

  defun async_job_runner_pool(epool_id :: v[EPoolId.t]) :: atom do
    Module.safe_concat(async_job_runner_pool_parts(epool_id))
  end
  defun async_job_runner_pool_unsafe(epool_id :: v[EPoolId.t]) :: atom do
    Module.concat(async_job_runner_pool_parts(epool_id))
  end
  defunp async_job_runner_pool_parts(epool_id :: v[EPoolId.t]) :: [String.t] do
    common_parts(epool_id, "AsyncJobRunnerPool")
  end

  defun async_job_broker(epool_id :: v[EPoolId.t]) :: atom do
    Module.safe_concat(async_job_broker_parts(epool_id))
  end
  defun async_job_broker_unsafe(epool_id :: v[EPoolId.t]) :: atom do
    Module.concat(async_job_broker_parts(epool_id))
  end
  defunp async_job_broker_parts(epool_id :: v[EPoolId.t]) :: [String.t] do
    common_parts(epool_id, "AsyncJobBroker")
  end

  defun websocket_connections_counter(epool_id :: v[EPoolId.t]) :: atom do
    Module.safe_concat(websocket_connections_counter_parts(epool_id))
  end
  defun websocket_connections_counter_unsafe(epool_id :: v[EPoolId.t]) :: atom do
    Module.concat(websocket_connections_counter_parts(epool_id))
  end
  defunp websocket_connections_counter_parts(epool_id :: v[EPoolId.t]) :: [String.t] do
    common_parts(epool_id, "WebsocketConnectionsCounter")
  end

  defunp common_parts(epool_id :: EPoolId.t, suffix :: String.t) :: [String.t] do
    ({:gear  , gear_name}, suffix) -> ["#{@prefix}.Gear"  , Atom.to_string(gear_name), suffix]
    ({:tenant, tenant_id}, suffix) -> ["#{@prefix}.Tenant", tenant_id                , suffix]
  end

  # Async job queues are treated a bit differently, as they are cluster-wide.
  # `:async_job_queue_name_prefix` is introduced here so that some existing deployments can preserve the historic name of job queues.
  # New deployments should be OK with the default value.
  @job_queue_prefix Application.get_env(:antikythera, :async_job_queue_name_prefix, @prefix)

  defun async_job_queue(epool_id :: v[EPoolId.t]) :: atom do
    Module.safe_concat(async_job_queue_parts(epool_id))
  end
  defun async_job_queue_unsafe(epool_id :: v[EPoolId.t]) :: atom do
    Module.concat(async_job_queue_parts(epool_id))
  end
  defunp async_job_queue_parts(epool_id :: EPoolId.t) :: [String.t] do
    {:gear  , gear_name} -> ["#{@job_queue_prefix}.Gear"  , Atom.to_string(gear_name), "AsyncJobQueue"]
    {:tenant, tenant_id} -> ["#{@job_queue_prefix}.Tenant", tenant_id                , "AsyncJobQueue"]
  end
end